Enchantment Fighter Class (Gain the next level as a sorcery to add its ability.) When this Class enters, search your library for an Equipment card, reveal it, put it into your hand, then shuffle
Cats If youre more of a cat person than a dog person, then build a deck around your feline companions
Whenever an opponent casts a noncreature spell with mana value less than this creature's power, draw a card
Its extremely easy for these commanders to come out ahead on this exchange and there are plenty of ways for them to use the cards that get discarded too
Its versatility and efficiency make it almost universally valued, especially in mono-blue decks that might lean on key creatures for their game plan
Finding these cards outside Japan is challenging, and they command premium prices due to their rarity